1. Laboratory of Image Science and Technology, Southeast University, Nanjing, China
2. College of Computer and Information, Anhui Polytechnic University, Wuhu, China
3. College of Computer Science, Sichuan University, Chengdu, China
4. Centre de Recherche en Information Biomédicale Sino-Français, Rennes, France
5. Jiangsu Provincial Joint International Research Laboratory of Medical Information Processing, Southeast University, Nanjing, China